Interferometric optical display system with broadband characteristics
First Claim
1. An interferometric display device, comprising:
- means for transmitting light; and
means for interferometrically reflecting light through said transmitting means, wherein said interferometrically reflecting means comprises an absorber over a portion of the transmitting means and a movable reflective layer over the absorber, wherein said absorber has an extinction coefficient (k) below a threshold value for wavelengths of light within an operative optical range of the interferometrically reflecting means.
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Accused Products
Abstract
Broad band white color can be achieved in MEMS display devices by incorporating a material having an extinction coefficient (k) below a threshold value for wavelength of light within an operative optical range of the interferometric modulator. One embodiment provides a method of making the MEMS display device comprising depositing said material over at least a portion of a transparent substrate, depositing a dielectric layer over the layer of material, forming a sacrificial layer over the dielectric, depositing an electrically conductive layer on the sacrificial layer, and forming a cavity by removing at least a portion of the sacrificial layer. The suitable material may comprise germanium, germanium alloy of various compositions, doped germanium or doped germanium-containing alloys, and may be deposited over the transparent substrate, incorporated within the transparent substrate or the dielectric layer.
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Citations
43 Claims
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1. An interferometric display device, comprising:
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means for transmitting light; and means for interferometrically reflecting light through said transmitting means, wherein said interferometrically reflecting means comprises an absorber over a portion of the transmitting means and a movable reflective layer over the absorber, wherein said absorber has an extinction coefficient (k) below a threshold value for wavelengths of light within an operative optical range of the interferometrically reflecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A MEMS display device comprising:
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a substrate upon which incident light enters; and an array of interferometric modulators deposited on said substrate, wherein said array comprises a movable reflective layer over said substrate and an absorber between said reflective layer and said substrate, wherein said absorber has an extinction coefficient (k) below a threshold value for wavelengths of light within an operative optical range of the interferometric modulator. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification